Are We Smarter Than Dogs?

I always hear people saying that animals aren’t as smart as humans. But where’s the proof? Actually if you think about it you could say that some animals are smarter than humans. Humans are the only ones that kill their own race. Animals only kill their own if it’s territorial and most of the time it’s not killing it’s just scaring off. Animals obviously have their own language and some can understand human language. Humans can’t understand any animal language other than body language. I just wanted some feedback on this.